Abstract: A screed ski system includes a plurality of circlip saddles supported by corresponding stakes and a plurality of sections of screed ski tubing is snap-fit into the circlip saddles. After screeding of a first layer of aggregate or plastic material, the screed ski tubing and circlip saddles are removed as a unit. The spacers are optionally placed on the stakes, and the screed ski tubing and circlip saddles are placed as a unit on the spacers to facilitate screeding of a second layer of aggregate or plastic material over the first. Some of the screed ski tubing can be flexible to provide an arcuate screed ski.

Abstract: This application relates to a method of forming an inlaid pattern in an asphalt surface. The pattern may be selected for functional or decorative purposes. In one embodiment the method comprises the steps of providing a first template having a predetermined pattern; impressing the first template into the asphalt surface when the asphalt surface is in a pliable state to form an impression therein; removing the first template from the asphalt surface to expose the impression; providing a second template having a predetermined pattern matching the pattern of the first template; inserting the second template into the impression; and fixing the second template in position within the impression to form the inlaid pattern. The second template may consist of a preformed thermoplastic grid having a color and/or texture contrasting with the asphalt surface. In another embodiment the second template may include a light source for illuminating the template after it has been fixed in position.

Abstract: A method for restoring load transfer capability across a joint between two adjacent concrete slabs includes cutting a perpendicular to the joint and extending into each of the adjoining slabs. A generally flat joint tie is positioned in the slot before filling the slot with polymer concrete. The joint tie may have holes extending between the broad faces of the joint tie, with rounded corners, and made of fiberglass.

Abstract: A system and device is disclosed for obtaining a topographical profile of a road bed, and then delivering an asphalt mat that varies in thickness according to that profile. The system enables variance in the mat thickness across the width of the mat as well as in the normal longitudinal direction. The process is begun by obtaining a three-dimensional profile of the surface to be paved. A topographical scanner is moved over the road surface to obtain a profile of the entire length and width of the surface to be paved to obtain a detailed topographical profile. In a second phase of the operation, the topographical scanner is utilized in combination with an asphalt delivery mechanism. The topographical scanner tracks the exact position of the asphalt delivery mechanism, correlates that to the scanned profile, and thereby controls the operation of the asphalt delivery mechanism.

Abstract: In a method of reinforcing and waterproofing a paved surface, a layer of liquefied asphalt is applied on a paved surface. A reinforcement mat is then applied over the liquefied asphalt. The reinforcement mat includes a first layer comprising a nonwoven mat produced from fibers selected from the group consisting of mineral fibers, polymer fibers, and mixtures thereof. The reinforcement mat also includes a second layer of mineral fibers attached to the first layer. The liquefied asphalt penetrates and soaks the reinforcement mat to form a water barrier. A layer of paving material is then applied a over the reinforcement mat. The first layer and the second layer of the reinforcement mat are attached to each other by any one of sewing, knitting, needling, heat treating, and adhering with an adhesive, or combinations thereof.

Abstract: A method and apparatus for controlling the mixing of asphalt aggregate with rejuvenating materials in an asphalt rejuvenating machine. According to the method, milled aggregate is discharged in a windrow of fixed width, and windrow height is compared to rejuvenating machine speed to determine a volume rate of material being processed. A processor controller calculates a required amount of rejuvenating fluid addition based on the volume rate being processed and a desired proportion of rejuvenating fluid to aggregate. The processor controller controls a sprayer which directs rejuvenating fluid at some point along a zone extending from a milling apparatus to a mixer.

Abstract: The Musical Highway is the controlled measurement of spacing between grooves running perpendicular to the flow of traffic in a roadway, to produce various audible pitches.

Abstract: A method for patching or repairing a hole in a road surface is defined by filling the hole and the area of the road surface about the hole with an oil-based adhesive, which is used to adhere a quantity of patching asphalt which is placed into the hole and into the area surrounding the hole having the adhesive applied thereto. After the asphalt is compressed or packed into the hole and into the surrounding area above the hole, a layer of sand is then applied thereover, which is, also, subsequently compressed into the asphalt to fill the pores thereof.

Abstract: This invention relates to a finishing device to lay and compact asphalt layers and a method for operating the device. The finisher according to the invention is provided with a receiving device for the temporary storage of the hot mixture. The receiving device consists of two separate receiving buckets, from each of which a mixture transport system with at least one conveyance device leads to the distribution devices, and the distribution devices are constructed as spreader screws.

Abstract: There is described a method for controlling the amount of ionized gases and/or particles suspended in the air above roads, streets, open spaces or the like. This is done by establishing an electrical field between the top layer of a road, street, open space or the like, and the said ionized gases and/or particles. By means of controlling the electrical field we will be able to control the amount of ionized gases and/or particles. The invention also indicates how the electrical field can be established between surfaces in the immediate vicinity of a road, street, open space or the like, for example in tunnel walls. The electrical field is established by making at least the top layer of the surface concerned electrically conductive and connecting it to earth or to one pole of an electrical voltage source.

Abstract: A method of applying guidelines or guide ribs in the walking direction for visually handicapped persons. The method involves the steps of providing a mold having a plurality of slots arranged in mutually spaced rows, placing the mold in contact with a travel surface with the slots aligned relative to a travel path, filling the slots with a synthetic resin and permitting the resin to set, and then removing the mold.

Abstract: A method of paving a gravel and/or dirt roadway is provided. This method includes evaluating the roadway to determine if it is an appropriate candidate for emulsion stabilization, rotating a milling head down a roadway to break up gravel and dirt, injecting an asphalt emulsion into the broken up gravel and dirt, and mixing the emulsion with the gravel and dirt so as to form an emulsion stabilized layer. The emulsion stabilized layer is then spread and compacted to create a paved roadway. Following this, a wearing surface may be applied to the emulsion stabilized layer.

Abstract: A cutting machine for cutting depressions in a road surface. The cutting machine includes a rotatable cutting drum connected with a drive device for rotating the cutting drum and an engaging device for moving the cutting drum out of and into contact with the road surface. The drive device includes a gear box with a flywheel located on the input side of the gear box and the cutting drum comprises a plurality of cutting teeth, the teeth removably retained to the cutting drum to effectively cut the road surface and includes a means for anchoring a tooth shank to a tooth holder permanently affixed to said cutting drum. A power unit that moves the cutting drum along the road surface is provided with a detector for continuously detecting a distance that the cutting drum is moved by the power unit and for generating a signal indicative of the distance moved.

Abstract: A process is designed to finish all slits of the surface layer of an airplane runway. The process involves a first step in which a slit is heated such that the surface of the slit is dry, and that the capillary holes of the slit are opened up. The surface of the slit is then provided with a coating of an asphalt synthetic agent. The coating is subsequently heated to cause the molecules of the asphalt synthetic agent to diffuse into the capillary holes of the slit, thereby preventing the water from finding its way into the gradation layer of the runway. In the meantime, the slit is provided with a soft interface capable of preventing the water from finding its way into the slits of the surface layer of the runway. The soft interface is securely attached to the slits regardless of the climatic changes.

Abstract: A cutting head is provided for milling rumble strip depressions in a road surface. The cutting head has a center rotational axis and a transverse diameter that varies along the length of the rotational axis so that an outer cutting surface of the cutting head defines a plane curve, such as an ellipsoid with truncated ends. The cutting head is mounted on a milling machine and rotated about the rotational axis as it is moved alternately up and down into the road surface. As the milling machine moves down the road, the movement of the cutting head creates spaced apart rumble strip depressions in the road. Because of the elliptical configuration of the cutting head cutting surface, the dimensions of the depressions can be varied along both the forward and lateral axes by simply varying the depth of cut. The curved profile of the cutting head along the rotational axis creates rumble strip depressions that avoid the sharp ninety degree corners and vertical side walls found in conventional rumble strips.

Abstract: A manhole cover cap, for an access cover of an opening into an underground utility structure, can be used to raise the level of an access, or manhole, cover, and to prevent water inflow. The cover cap includes upper and lower opposed surfaces and an outer edge having dimensions substantially conforming to dimensions of the opening, adapted for attachment to the access cover, and comprises a rubber material.

Abstract: A method to repair a portion of a PCC sidewalk that has been damaged due to changes in an underlying support surface. The method includes removing a portion of the PCC sidewalk that is damaged and replacing the damaged portion with a piece of solid, yet flexible, material. The material is fitted to and installed in a volume established by the removal of the damaged portions of the PCC sidewalk.

Abstract: A work machine is provided and adapted for use in paving operations. The work machine has a conveying system for moving paving material from a first end portion to a predetermined distance beyond a second end portion. A receiving portion is included on the second end portion and is adapted to receive a plurality of operational attachments. The plurality of attachments transforms the work machine into three distinct machines that perform different paving operations.

Abstract: In a method of reinforcing and waterproofing a paved surface, a layer of liquefied asphalt is applied on a paved surface. A reinforcement mat is applied over the liquefied asphalt. The reinforcement mat is a nonwoven mat produced from fibers having a melting point above about 320° F. (160° C.), and selected from mineral fibers such as glass fibers, polymer fibers, or mixtures thereof. The liquefied asphalt penetrates and soaks the reinforcement mat to form a water barrier. A layer of paving material is applied over the reinforcement mat.

Abstract: A method is disclosed for a controller to automatically switch to an alternative control mode to control the height of a grading implement when the output of a positioning sensor is not available. According to the invention, the controller recognizes sensor unavailability and automatically switches to an alternative operating mode to maintain control. In one alternative operating mode, the controller recognizes sensor unavailability and automatically routes the control signal from the unaffected side to the control channel for the affected side. In another alternative operating mode, the controller monitors the current value of an additional sensor for an alternative mode of control until one of the primary sensors becomes unavailable, and then automatically switches to the alternative mode for the affected side, using the last known value for the alternative mode as the set point.

Abstract: A method for treating golf course sand traps to reduce contamination of the sand and to reduce erosion. The bottom of the trap, which is substantially devoid of playing sand is roughened. An initial amount of hydrophobic liquid polyurethane is applied to the roughened soil on the bottom of the trap. The trap is raked and an additional amount of hydrophobic liquid polyurethane is applied to the bottom of the trap. A thin layer of sand is applied to the bottom of the trap and a further additional amount of hydrophobic liquid polyurethane is applied to the sand and the sand is raked. The thin layer of sand is sprayed with water and the trap is permitted to cure for approximately 24 hours. A sufficient amount of playing sand is then added to the trap so the trap is playable.

Abstract: An apparatus for spreading, screeding and/or compacting cold paving material to a surface to be paved including a frame of a width substantially equal to the width of the surfaced to be paved. The frame has first and second sides that define the width of the frame. The apparatus includes a pile breaker that has one or more pile breaking rollers that are shorter than the full width of the frame and are connected to the frame. Behind the pile breaker, there is a height-adjustable screed roller for screeding the paving material. There may also be a compacting roller behind the screeding roller to compact the paving material. The cold paving material can be cold asphaltic mixture or similar material, Portland cement concrete or similar material or other paving material at ambient temperature.

Abstract: A truss screed includes a shaft guard that covers the screed's exciter shaft to protect it from concrete and debris and that protects the surroundings from the rotating exciter shaft. The shaft guard includes a plurality of tubing sections that surround the shaft and that are supported on joints disposed between the guard sections. In a first preferred embodiment of the shaft guard, each joint includes a resilient spring ring, a support cup that receives the spring ring and an end of an associated tubular section, and a bearing that engages the support cup and that supports the joint and a portion of the exciter shaft on the screed's frame. In a second preferred embodiment, each joint includes a support cup that supports an end of the associated tubular section, a bearing, and a U-shaped bracket that couples the support cup to the bearing. The bearing and/or the bracket have elongated slots therethrough for accommodating misalignment of joint components.

Abstract: An apparatus and method of using the apparatus for creating rumble strips in a surface such as asphalt or concrete, including a vehicle with an attachment coupled thereto. The attachment includes a cutter wheel having teeth thereon and a flywheel coupled with the cutter wheel. A hydraulic motor is coupled with the cutter wheel for rotating the cutter wheel and the flywheel. Eccentric cams are provided for moving the cutter wheel vertically with respect to the surface being cut, and a gear box is coupled with the eccentric cams for rotating the eccentric cams. The eccentric cams do not contact the surface being cut. The apparatus further includes a sliding assembly coupled with the cutter wheel. The sliding assembly is both horizontally and vertically movable with respect to the surface being cut.

Abstract: A crack repair method for pavement and recreational surfaces includes a slip layer formed over a filled crack which prevents the adhesion of at least one stretchable sheet to the crack while wider outer edges of the sheet are bonded to the top pavement surface. Optionally a second wider stretchable sheet is adhesively applied over the first sheet. Outer edges of the uppermost stretchable sheet are optionally covered by fiberglass fabric strips. In one aspect, the slip layer is formed of one or more tape strips adhesively joined on one side to the filled crack and to the top surface of the pavement surrounding the filled crack.

Abstract: The curb forming and extruding machine forms continuous concrete edging while reducing and/or substantially eliminating voids, flat spots or weak areas caused by smoothed sections in the packed concrete. Also, concrete bridging in the hopper, and the associated problems, are reduced and/or eliminated. The curb forming machine includes a plunger which is driven along a path of travel including a forward position to force the curb forming material from the lower hopper section into and through the curb extrusion mold, an upward position so that the plunger extends into the upper hopper section, and a rearward position away from the curb mold and in the lower hopper section. The plunger extending into the upper section of the hopper eliminates concrete bridging and also scores the concrete as it packs it into the mold.

Abstract: In the method of the present invention, a machine having a tool with hydraulically moveable ends, such for example as a screed head, is setup for operation by using an inclinometer or other sensor to determine the orientation of the tool. According to this method, the on grade elevational position of the first end of the tool with respect to the reference is selected, and the first end of the tool is then moved to the desired elevational position while an elevation receiver at the first end detects the reference, such as a beam of laser light. The on grade orientation of the tool along its length from one end to the other is selected, and the second end of the tool moved until the on grade orientation of the tool along its length is sensed. The reference is then detected with the elevation receiver at the second end of the tool. The detected positions of the reference at the first and second ends of the tool are then stored as on grade positions.

Abstract: A control system controls movement of individual hydraulically moveable ends of a screed head carried by a boom of a machine so as to maintain a selected elevational position between each end of the screed head and a reference in a concrete paving application. One of a pair of elevation receivers is mounted at each end of the screed head, providing a first and second signals indicating the position of the first and second ends of the screed head in relation to the reference. A sensor, mounted on the screed head, senses the orientation of the screed head along its length from the first end to the second end and providing a third signal indicating such orientation.

Abstract: A method of stabilizing the ground underlying roadways. Cement is mixed thoroughly with a microfill agent, and optionally a water reducing agent, to obtain a highly reactive and dry cement mixture. The dry cement mixture is blended with at least one of the materials soil, clay, or stone, and sufficient water so that after compaction the blend will have a compressive strength of at least 5 MPa after 28 days. The blend is spread on the ground to a thickness of at least 15 to 30 centimeters and a roadbed is laid over the blend after the blend has cured.

Abstract: A method and apparatus for controlling the mixing of asphalt aggregate with rejuvenating materials in an asphalt rejuvenating machine. According to the method, milled aggregate is discharged in a windrow of fixed width, and windrow height is compared to rejuvenating machine speed to determine a volume rate of material being processed. A processor controller calculates a required amount of rejuvenating fluid addition based on the volume rate being processed and a desired proportion of rejuvenating fluid to aggregate. The processor controller controls a sprayer which directs rejuvenating fluid at some point along a zone extending from a milling apparatus to a mixer.

Abstract: A method and apparatus for ground working. A first step involves providing an apparatus for ground working with telescopically extendible wheel supports which permit the height and angular orientation of the chassis to be adjusted to suit a contour of a ditch. A second step involves positioning the apparatus with at least one support wheel in the ditch and at least one support wheel on the road. A third step involves driving along the ditch broadcasting gravel from the ditch onto the road with the drum. Instead of hauling in replacement gravel from a remote site, gravel is reclaimed from the ditch and broadcast back onto the road.

Abstract: Method and apparatus for compacting soil and for determining a mechanical characteristic of soil, including a method and apparatus for periodically compacting soil with a soil compacting device so as to make the soil and the soil compacting device vibrate together as a single oscillatory system, analyzing the vibration of the soil and soil compacting device, and adjusting an oscillatory driving force so as to drive the single oscillatory system towards a characteristic resonance frequency &OHgr;.

Abstract: A blending apparatus which forms part of an asphalt pavement resurfacing machine has first and second stages. The first stage receives milled material through an inlet and blends the milled material with a rejuvenating fluid. The first stage has a transversely extending shaft from which paddles extend radially to blend the milled material with the rejuvenating fluid and direct it toward a first stage outlet. The second stage receives the blended material from the first stage outlet. The second stage has a respective shaft with mixing paddles extending radially therefrom to further blend the material and direct it toward a second stage outlet.

Abstract: A system for molding a design onto a surface comprising providing an asphalt molding mesh comprising pattern molding elements formed of a flexible material having a generally V-shaped cross-section in a configuration corresponding to a pattern to be molded in the asphalt, wherein the molding mesh is in the form of an open mesh, defining open spaces between the molding elements; positioning the molding mesh onto the surface and depositing hot asphalt into the open spaces between the molding elements and levelling the asphalt, and then rolling over the mesh and asphalt to mold and compact the asphalt about the mesh and facilitate adherence to the underlying surface, and, after rolling, removing the molding mesh from the asphalt.

Abstract: A road resurfacing device has a frame on which is mounted a ripper bar for ripping the road surface, to a controlled depth, and behind it a separator for separating coarse and fine material in the road surface such the coarse material is deposited on fine material. The frame is supported by rollers extending across the frame. The ripper bar has depending teeth in rows on both sides of the ripper bar and is rotatable so that either sets of teeth, which may be at different heights, rip the road surface. The separator is formed of ground turning discs mounted on angled shafts to direct material first to one side and then to the other. The ground turning discs rotate counter to the direction of movement of the frame. A method of resurfacing a gravel road includes ripping the surface of the gravel road to break up fine and coarse material near the surface of the gravel road; and separating coarse material from fine material such that coarse material is deposited on top of the fine material.

Abstract: An implement is described for use in filling wheel tracks (e.g. irrigation sprinkler wheel tracks or ruts) with granular fill material. The implement includes a wheeled frame, a hopper with a bottom opening, and a filling guide suspended below the opening in the hopper for guiding fill material directly into the wheel track. Preferably, the filling guide a includes a rear wall which has a concave lower edge to shape or contour the upper surface of the fill material placed in the wheel track.

Abstract: A method for molding a pattern on the surface of heated asphalt. The method includes: providing an asphalt molding mesh comprising pattern molding elements formed of an elastic material having a V-shaped cross-section in a configuration corresponding to a pattern to be molded in the asphalt. The mesh is then heated to substantially equalize with that of the surface of the asphalt. The mesh is positioned and inserted at least partially into the asphalt. The mesh and asphalt are rolled over to mold the asphalt and compact the asphalt about the mesh. Water is applied to the surface of the asphalt while rolling to limit the heating and expansion and buckling of the mesh. Finally, molding mesh is removed from the asphalt.

Abstract: A method of compacting a mat of hot mix asphalt which has been laid by an advancing asphalt paver, the method comprising advancing an asphalt compactor over the laid asphalt such that a compaction surface of the compactor, formed by a lower run of at least one belt, is engaged with any one portion of the mat for a period of at least 1.5 seconds, the compaction surface applying a maximum average load stress to the mat of less than about 50 kPa. Compaction may be achieved using a compactor (60) comprising two longitudinally spaced modular compaction units (62) connected relative to each other, and a power source for driving at least one of the modular compaction units (62), wherein at least one of the modular compaction units (62) is adjustable to permit steering of the compactor, and wherein each of said modular compaction units (62) comprises a compaction belt (74), support means (78, 80) for the belt to define a planar lower run of the belt (74) forming a compaction surface.

Abstract: Provided is an overlay concrete which is good in bond to existing concrete fabrics and satisfies properties such as strength, durability and workability. The overlay concrete of the present invention comprises an AE water reducing agent or superplastisizer, and has a slump of 2 to 8 cm, a cement-water ratio of 35 to 45%, and a sand-coarse aggregate ratio of 36 to 42%.

Abstract: A method of compacting a mat of hot mix asphalt which has been laid by an advancing asphalt paver, the method comprising advancing an asphalt compactor over the laid asphalt such that a compaction surface of the compactor, formed by a lower run of at least one belt, is engaged with any one portion of the mat for a period of at least 1.5 seconds, the compaction surface applying a maximum average load stress to the mat of less than about 50 kPa. Compaction may be achieved using a compactor comprising two longitudinally spaced modular compaction units connected relative to each other, and a power source for driving at least one of the modular compaction units, wherein at least one of the modular compaction units is adjustable to permit steering of the compactor, and wherein each of said modular compaction units comprises a compaction belt, support means for the belt to define a planar lower run of the belt forming a compaction surface.

Abstract: A concrete placing machine includes a wheeled base unit and a concrete placing pipe assembly extending from the base unit. The base unit includes a lower wheeled portion and an upper swivel portion. An hydraulic swivel device is provided between an hydraulic pump at the upper swivel portion and hydraulically operated devices at the lower portion of the base unit, in order to facilitate communication of pressurized hydraulic fluid between the pump and hydraulic devices, while allowing 360 degrees of rotation of the upper swivel portion relative to the lower wheeled portion. The hydraulic swivel device further provides a passageway therethrough for a concrete connector pipe to connect the pipe assembly at the upper swivel portion to a supply pipe connected to the lower wheeled portion, whereby the upper swivel portion and the pipe assembly are also rotatable with respect to the lower wheeled portion and the supply pipe.

Abstract: A method and a device are provided for determining the degree of compaction during ground compaction with a roller or a vibrating plate compactor comprising a top section and a vibrating plate. The method involves determination of one or more amplitude values of the vibration at approximately the excitation frequency of the plate relative to the top section, one or more amplitude values of one or more vibrations of the plate relative to the top section at a maximum of 60% of the excitation frequency, and the quotient of the aforementioned amplitude values as a measure of the current degree of compaction of the ground. The device includes a sensor for non-contact detection of the relative movements between the top section and the vibrating plate or roller.

Abstract: The resurfacing of roads and in particular bridge decks includes spreading with a squeegee a thin layer of polymer modified concrete over a bridge deck surface and then applying by broadcasting a layer of rock chips to the wet concrete to provide a high friction surface. A second layer of the polymer modified concrete is then applied over the first layer of rock chips using the squeegee and a second layer of rock chips is then broadcast over that layer and then heavy quartz sand is applied. In another embodiment, heating wires are laid on the road surface and a thick layer of polymer modified concrete is applied over the wires to embed them in the polymer modified concrete. Then a single layer of rock is applied to the surface of the polymer modified concrete. If ruts or potholes are present in the road surface, these defects are repaired prior to the road resurfacing.

Abstract: A method and apparatus for spreading paving materials. A chassis forms a support structure for the spreader and includes a front side facing toward a paving direction, a rear side opposite the front side, a receiving side facing toward a haul road and a far side opposite the receiving side. A receiving conveyor belt extends across the haul road and runs to a central point beneath the chassis, the receiving conveyor belt receives paving materials from delivery trucks traveling along the haul road and transports the paving materials to the central point where the paving materials fall off the receiving conveyor belt and onto a swinging delivery conveyor belt. The delivery conveyor belt includes a first end located at the central point beneath the receiving conveyor belt and extends beyond the rear side of the chassis to a second end of the receiving conveyor belt.

Abstract: This invention relates to a finishing device to lay and compact asphalt layers and a method for operating the device. The finisher according to the invention is provided with a receiving device for the temporary storage of the hot mixture. The receiving device consists of two separate receiving buckets, from each of which a mixture transport system with at least one conveyance device leads to the distribution devices, and the distribution devices are constructed as spreader screws.

Abstract: A global positioning system (GPS) controlled paint spray system. The system includes a paint sprayer driver program and a GPS paint sprayer. The paint sprayer driver program enables a user of a standard drawing program using a standard personal computer to generate a print file for a drawing pattern. The GPS paint sprayer includes a GPS receiver, a geographical converter for enabling a user to convert the drawing pattern to geographical locations, a location comparator for detecting a location match between the geographical locations of the drawing pattern and a current GPS-based location, and a spray nozzle to spraying paint for matched locations.

Abstract: A machine for dispensing a sealing compound to an area of application and a method of sealing cracks in pavement is provided. The machine includes a frame structure, a disposable container removably mounted to the frame structure, a discharge tube member rupturing the opening in the bottom of the container, and a controllable valve in the discharge tube member to control the flow of the sealing compound from the disposable container to the area of the application. The frame structure may support a blower to clean the crack and supports a squeegee member mounted to a box member into which the sealing compound is received from the discharge tube member, to evenly spread the sealing compound within the crack and in the nearmost areas.

Abstract: Cavitation is produced through injection of pressurized water from an injection outlet of an injection nozzle 17a toward the pavement surface in liquid of a liquid storage part T1 formed on the pavement surface. A clogging object in a cavity of a pavement is isolated by impactive force of the cavitation, and the isolated clogging object is removed by suction with water.

Abstract: Apparatus and methods are provided for filling a groove in a pavement with a groove filling grout. The present invention is particularly useful for forming long-lasting pavement markings, such as lane striping.

Abstract: A method and apparatus for altering an aggregate gradation mixture of an asphalt concrete mixture. The apparatus includes a heater for heating a layer of existing roadway materials, a milling and mixing auger for milling the heated layer of existing roadway materials and a hopper and conveyor for providing a predetermined amount of treated new usable aggregates to the milling and auger for mixing with the heated layer of existing roadway materials in order to produce a new asphalt concrete mixture. The auger including a plurality of milling bits extending therearound for receiving the predetermined amount of aggregates and mixing them with the milled layer of existing roadway materials, the milling bits are slanted to direct the aggregates received thereby and milled layer to a center line of the apparatus. A second auger is positioned along the center line of the apparatus and behind the auger for further mixing the new asphalt concrete mixture.